Home / 13,149.92-18,145.68-7,842.08

Finding the Fourth Proportional to 13,149.92, 18,145.68 and 7,842.08

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Solution

The fourth proportional to 13,149.92, 18,145.68 and 7,842.08 is: 10,821.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.92 : 18,145.68 = 7,842.08 : x
  2. Step 2: Convert to fraction form
    13,149.92/18,145.68 = 7,842.08/x
  3. Step 3: Cross multiply
    13,149.92x = 18,145.68 × 7,842.08
  4. Step 4: Simplify right side
    13,149.92x = 142,299,874.21
  5. Step 5: Solve for x
    x = 142,299,874.21/13,149.92
  6. Step 6: Final answer
    x = 10,821.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.